Improvement in telegraph-relays



G. ALLAN & J. W. BROWN.

TELEGRAPH-RELAY.

Patented June 13, 1876.

UNITED STATES PATENT OFFICE.

GEORGE ALLAN AND JAMES WALLACE BROWN, OF LONDON, ENGLAND.

IMPROVEMENT IN TELEGRAPH-RELAYS.

Specification forming part of Letters Patent N 0. 178,579, dated June 13, 1876; application filed May 5, 1876.

To all whom it may concern:

Be it known that we GEORGE ALLAN and JAMEsWALLAoE BROWN, of London, England, have invented an Improved Relay or Peoker, of which the following is a specification The object of the said invention is to record dots and dashes transmitted through a submarine cable or other difticult circuit-it may be a land lineby closing and breaking local circuit on any of the well-known recorders, either chemical or otherwise, at a superior rate of speed.

As means for effecting the above object, we construct a relay or pecker so that the armature or contact-maker shall act with a com,- pound motion. Equilibrium-sprin gs are preferably applied to the contact-maker or armature.

By-the above means a fall or rise of potential in the actuating-current will serve as effectually to make or break contact as if the current were reversed.

Figures] and 2 of the sheet of drawings hereunto annexed are illustrative of our said invention.

In Fig. 1, a a are steps of the receiver; 1) Z), local wires. The contact-maker or armature is formed of two pieces, 0 c. The part 0 vibrates on the fixed center 6, and the piece 0 0n the pivot e, secured to c. f, compensatingsprings; g,elcctro-magnets; h, earth and'line wires.

It will be seen that the'piece c is free to vibrate the whole distance allowed by the compensating or equilibrium springs f, while the piece 0 never moves a greater distance than the space between the stops at a. The friction between 0 c is sufficient to insure simultaneous movement except when the piece c is retained by one of the stops at a.

Fig. 2 shows a modification of mechanism, acting in the same manner as Fig. 1. Heret' i are the stops; jj, local wires; 70 70, contactmaker; Z, center secured tolc m, compensat ing-springs; n, electro-magnets; 0, earth and line .wires; 19, tension-spring, to adjust or regulate the friction between the pin 1 and piece it.

Having now described our said invention so that others will be enabled to understand it, we claiin- 1. .The compound armature or contact-maker c 0, formed of the lever c and the yoke or piece 0, operating in combination with the receiver a a, substantially as and for the purpose set forth.

2. The combination of the .parts 0, c, and f, operating substantially as and for the purposes set forth.

3. The compound armature or contact-maker k 70, formed of the lever is, yoke or piece 70, and adjusting-spring p, in combination with the receiver 2' c", operating substantially as and for the purposes set forth.

G. ALLAN. J. W. BROWN.

Witnesses:

E. '1. HUGHES,

123 Chancery Lane, London. WAL ER A. BARLOW,

- 123 Chancery Lane, London. 

